classic waka stream

いにしへの野中の清水ぬるけれど
本の心を知る人ぞ汲む
Roma-ji

Inishie no nonaka no shimizu nurukeredo moto no kokoro o shiru hito zo kumu

English Translation
The clear spring
in the midst of the old fields
has grown lukewarm,
yet those who know its first heart
still come to draw from it.
Meaning
The clear spring in the fields of old has grown lukewarm, yet those who know its original heart still come to draw from it.
Commentary
Book Seventeen Miscellaneous Poems I 887

Headnote: "Topic unknown"
The spring in the fields, once cool and pure, has now grown lukewarm, but those who knew it as it was still draw from it. It is a figure for how those who knew something in its prime go on cherishing it even after it has faded. The author is unknown.
The Nonaka spring is said to have been in Inamino in Harima, a poetic place, and from this poem the phrase came to mean an old friend or a former lover.

First line "inishie no" means "of old," suggesting the time of its prime. The next poem, 888, begins with the same line, linking the two.
Second line "nonaka no shimizu" is the clear spring welling in the fields, known as a poetic place.
Third line "nurukeredo" admits with the adversative do that the water is now lukewarm.
Fourth line "moto no kokoro o" uses the same phrase as "moto no kokoro wa" in the preceding poem, 886, overlaying the spring's true nature and the heart of old.
Fifth line "shiru hito zo kumu" closes zo with the attributive kumu.
Author
Unknown Poet
Source
Kokin Wakashu
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